1. Please advise what this is. (Gadget to which the arrow pointing)2. Then also, the yellow wire is hanging loose with no obvious connecting point. The blue/green wire runs to the negative pole of the battery. Any idea where it should go?3. All of a sudden the car won't start. All the lights in the dash is on, good power in the battery, but the starter won't turn over. Then by accident I applied brakes while trying to start the car. Low and behold, it starts. Now, if you want to start, I have to step on the brake pedal, release it slowly while turning the key. Odd? Or Not? Any ideas please.

In truth I am not sure what exactly that is. The only thing I can say is that mine doesn't have one. But, from memory, is that not a solenoid that prevents the engine running on when you switch off?

What is the black plastic pipe that appears to be connected to it? Fuel?

If the non yellow wire goes to earth then presumably the yellow connects in some way to power, either switched or through some other component. Might it be worth temporarily connecting to the battery positive via a meter to see what the current draw is and also whether the starting is more normal.